Transmission-gear.



C P, SJOLANDER & 0. D. BUSH.

TRANSMISSION GEAR. APPLICATION FILED AUG. 14. I917.

Patented Apr. 2, 1918. 2 SHEETS-SHEET I I N VEN TOR Zmm er WITNESSES ATTORN EV C. P. SJOLANDER & 0. D. BUSH.

TRANSMISSION GEAR. APPLICATION FILED AUG. i4. 1911. 1 61,307, Patented Apr. 2, 1918.

2 SHEETS-SHEET 2.

NTOR ave/er I: WMZiP 3% 02727:

ATTORNEY a: as r. sJoLAMnEn AND 01mm 1). BUSH, or MAMMOTH, canrr'onnm.

TRANSMISSION 451-.

Specification of Letters Patent.

Application filed Augustm, 1917. Serial No. 186,190.

To all whom it may concern:

Be it known that we, CHARLEs P. SJo- LANDER and ORRIN D. BUSH, citizens of the United States, residing at Mammoth, in the county of Shasta and State of California, have invented certain new and useful I mprovements in Transmission-Gears, of which the following is a specificatlon.

This invention has relation to variable speed transmissions for the transmission of power in vehicles, boats, and for the transmission of power to any klnd of machlnery, and has for an objectto provide a device of this character embodying a plurahtyof constantly meshing gears of different ratlos with means for selecting any ratio desired, thereby providing a noiseless tI'ELIiSIIllSSlOIl.

Another object of the inventlon 1s to provide a transmission having the above named characteristics and embodying novel meanswhereby any gear of the set may be selected and locked to the driving to ut1l1ze said gear selected for the transmission of power.

A stillfurther ob'ect of the invention 1s to provide a variahle speed transmission gear comprising two parts, with elements arranged and designed wlth a vlew to reducing friction, to permit the rapld assembly or disassociation of the parts, to perm1t economical and eflicient lubrication, and to permit manufacture of the device at a reduced cost'as compared to devices of a s1m1- lar character heretofore provided.

In addition to the foregoing our invention comprehends improvements in the details of construction and arrangement of the parts to be hereinafter more fully described and particularly set forth in the appended claim.

In the accompanying drawings in wh1ch similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear;

Figure 1, is a view illustrating the interior of a variable speed transmission gearing constructed in accordance with our invention, the cover of the casing being re moved for that purpose disclosing the trans mission gears.

Fig. 2, is a view of the gearing in longitudinal section and Figs. 3 and 4, are detail sections taken on the lines 3-3 and 4-4 respectively of Fig. 2.

With reference to the drawings, 10 indicates a circular hollow'casing having a pair of diametrically opposed openings 11 formed in the side wall to permit the insertion therethrough of a drive shaft 12. The walls are recessed around said openings to receive anti-friction bearings 13. An opening 14 is formed in the bottom of the casing to receive a driven shaft 15, the center of which shaft intersects the center .of the drive shaft at right-angles thereto.

The drive shaft is recessed longitudinally to receive a speed changin rod 16 slidab'ly held therein, a key 17 exten' ing transversely through said rod with the extremity of said key entering a pair of longitudinally extending slots 18 formed in the drive shaft to permit sliding movement of the rod relative to the shaft but to preclude relative rotation of said rod and shaft. A sleeve 19 is embraced about the drive shaft and extends from a point adjacent the intermediate portion of the shaft to one wall of the transmission casing, said end of the sleeve adjacent the wall of the transmission casing having a bevel gear 20 integrally formed therewith, said gear constituting the reverse gear. The end of the sleeve 19 opposite the end bearing the reversing gear is formed with an annular recess 21 designed to receive the extremities of the key 17 which projects through the slots 18 and extends beyond the surface of the drive shaft for that purpose, a pair of longitudinally extending recesses are furthermore formed at diametrically opposite points from the inner surface of the sleeve 19, in communication with the annular recess, said slots being indicated at 22.

Low, intermediate and high speed gears 23, 24 and 25 respectively are mounted u on the drive shaft, said gears being prefera hly bevel gears, the gears 24 and 25 having an annular recess 26 at each end which recesses are connected by extending slots 27 It will be noted that between the gears 24 and 25, and between the gears 25 and end of the sleeve 19, the remeans of longitudinally sleeve coact to form a relatively wide recess etc.

which is of a width corresponding to the width of thekey 17, the slots 27 connecting said recesses bein of a width to correspond to thickness of tl ie key whereby to permit assage therethrough of the terminals of the key in a manner which will be presently noted. The low speed gear 23 is formed with a recess 28 in one end which, in connection with the recess 26 of the next adjacent gear forms a relatively wide annular said gear being provided with three series of concentric annular gears indicated at 31, 32 and 33 designed mechanically for meshing engagement with the gears 23, 24 and 25 respectively. The three series of teeth on the gear 30 form in efi'ect three bevel gears which are integrally formed. The hub of the gear 30 is furthermore provided with an annular series of teeth 34 on the side of said gear 30 opposite the side bearing the three series of teeth for meshing engagement with a gear 35 which is mounted on a shaft 36 journaled in an opening 37 formed in one wall of the casing, said shaft 36 being adapted to be connected to the differential or other means for driving the wheels of a vehicle, the propeller of a boat,

The casing is formed with a ledge 38 which supports an annular ring 39 formed with a groove 40 which is disposed opposite a similar groove formed in an annular plate 41 fixed to one face of the gear 30, said grooves forming a raceway to receive spherlcal bearing members 42. The inner end of.

the drive shaft is formed with an enlarged head 43 while the opposite end of the shaft is threaded to receive a nut 44 which engages the outer surface of the casing and which when tightened holds the gear 30 upon the antifriction gearing. A jam nut 45 may be applied to the shaft to prevent dislodgement of the nut 44.

The source of power isconnected to the drive shaft-12 by universal joint ,or other connection, and the rod 16 may be connected by means of a swivel joint or the like to a lever (not shown) for shifting said rod. It will be noted that in the position of the parts shown in Fig. 2 wherein sleeve 17 is located so as to dispose its extremities in the annular groove 26 of the gear 25 and the annular groove 21 of the sleeve 19, al though the drive shaft 12 may be rotated constantly, there will be no application of power either tothe sleeve 19 or the gear 25.

To effect a transmission at high speed, the rod 16 is shifted so as to'engage the terminals of the key 17 in the slot 27 of the gear 25 thereby locking the drive shaft to said gear whereby rotation of said gear may be transmitted to the gear 30, thence to the gear 35 in the shaft 36. To obtain a decrease of speed the rod 16 is drawn outward so as to dispose the key 17 in either the slot 27 of the gear 24 or the slot 28 of the gear 23 so as to lock either of said gears to the drive shaft. A transmission of power in a reverse'direction may likewise be effected by moving the rod to an extreme inward position so as to engage the key 17 in the slot 22 of the sleeve 19 to lock said sleeve to the drive gear, and ow' to the fact that the bevel gear 20 forme on the said sleeve is at a point diametrically opposite the gears 23, 24 and 25, a rotative movement of the gear 30 in a reverse direction will be obtained.

It will be noted that we have provided advantages will be apparent to those skilled in the art to which this invention appertains.

While we have illustrated and described our invention with some degree of particularity various alterations thereover may be made and we therefore desire to reserve the right and privilege of changing the form of the details of construction, or otherwise altering the arrangement of the correlative parts without departing from the spirit of the invention or the scope of the appended claim.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is In a variable speed transmission mechanism, a hollow drive shaft, a rod telescopically engaged therein, a key carried by said rod, a plurality of gears fixedly mountof the driven shaft, a plurality of gears ear for loosely mounted on the drive shaft for mesh-i ing engagement with gears of the driven shaft to effect a. transmission of power at variable speeds, certain of the gears of the drive shaft having a pair of annular recesses and longitudinally extending keyways carrying the same, and means for sliding the rod whereby the key may be en-' gaged in any one of the key-ways to look any of said gears to the drive shaft, said key when engaged in the annular recesses permitting rotation of the drive shaft relative to the gears.

In testimony whereof We aflix our signatures in presence of witnesses.

CHARLES P. SJ OLANDER. ORRIN D. BUSH. Witnesses:

ALVA P. WARnnNs W. W. MIDDLETON, ALFRED W. BUSH, GEo. L. LAor. 

